tools/hv: Add memory allocation check in hv_fcopy_start

Added error handling for memory allocation failures
of file_name and path_name.

Signed-off-by: Zhu Jun <zhujun2@cmss.chinamobile.com>
Reviewed-by: Dexuan Cui <decui@microsoft.com>
Tested-by: Saurabh Sengar <ssengar@linux.microsoft.com>
Link: https://lore.kernel.org/r/20240906091333.11419-1-zhujun2@cmss.chinamobile.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Message-ID: <20240906091333.11419-1-zhujun2@cmss.chinamobile.com>

Author: Zhu Jun

tools/hv/hv_fcopy_uio_daemon.c

@@ -296,6 +296,13 @@ static int hv_fcopy_start(struct hv_start_fcopy *smsg_in)
 	file_name = (char *)malloc(file_size * sizeof(char));
 	path_name = (char *)malloc(path_size * sizeof(char));
 
+	if (!file_name || !path_name) {
+		free(file_name);
+		free(path_name);
+		syslog(LOG_ERR, "Can't allocate memory for file name and/or path name");
+		return HV_E_FAIL;
+	}
+
 	wcstoutf8(file_name, (__u16 *)in_file_name, file_size);
 	wcstoutf8(path_name, (__u16 *)in_path_name, path_size);